1,000 a thousand 10,000 ten thousand 100,000 a hundred thousand1,000,000 a million 10,000,000 ten million 100,000,000 one hundred million1,000,000,000 a billion 分数 1/3 one third 2/3 two thirds 1/4 a quarter 1/5 one fifth 2 4/5 two and fo…